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Supplemental Disclosure to Consolidated Statements of Cash Flows (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Nov. 30, 2012
Nov. 30, 2011
Nov. 30, 2010
Summary of cash and cash equivalents at the end of the period:      
Total $ 525,688 $ 418,074 $ 908,430
Supplemental disclosure of cash flow information      
Interest paid, net of amounts capitalized 65,541 48,038 71,647
Income taxes paid 826 335 807
Income taxes refunded 22,342 213 196,868
Supplemental disclosures of noncash activities:      
Increase in inventories in connection with consolidation of joint ventures 0 0 72,300
Increase in accounts payable, accrued expenses and other liabilities in connection with consolidation of joint ventures 0 0 38,861
Stock appreciation rights exchanged for stock options 0 0 2,348
Cost of inventories acquired through seller financing 53,625 0 55,244
Increase (decrease) in consolidated inventories not owned (19,803) 8,354 (41,626)
Acquired property securing note receivable 0 40,000 0
Homebuilding
      
Summary of cash and cash equivalents at the end of the period:      
Total 524,765 415,050 904,401
Financial services
      
Summary of cash and cash equivalents at the end of the period:      
Total $ 923 $ 3,024 $ 4,029